Battlefield International arrived at the 2013 AUVSI Unmanned Systems trade show in Washington DC with what was arguably the most well received promotional hand out of the entire event. Our original goal was to hand out something produced on our equipment in house that would be usable by anyone while at the same time assist us in marketing our EnduroLink fuel coupler. We designed and produced a unique machined pen that utilized our actual EL01Y EnduroLink locking sleeve assembly to retract the ink cartridge.